Now this returns true

src/plasma/configloader.cpp

@@ -432,7 +432,7 @@ QStringList ConfigLoader::groupList() const
     return d->groups;
 }
 
-void ConfigLoader::usrWriteConfig()
+bool ConfigLoader::usrWriteConfig()
 {
     if (d->saveDefaults) {
         KConfigSkeletonItem::List itemList = items();
@@ -441,6 +441,7 @@ void ConfigLoader::usrWriteConfig()
             cg.writeEntry(itemList.at(i)->key(), "");
         }
     }
+    return true;
 }
 
 } // Plasma namespace

src/plasma/configloader.h

@@ -142,7 +142,7 @@ protected:
     /**
      * Hack used to force writing when no default exists in config file.
      */
-    void usrWriteConfig();
+    bool usrWriteConfig();
 
 private:
     friend class Service;